Hi Sue

I think the apparent colour showing on the OP's crackle vase is just down to the opalescence to be honest. However the handles are amethyst aren't they?
The Collectors Weekly piece is interesting.
Personally I
probably wouldn't buy a piece purporting to be by Galle, Leveille, or Auguste Jean unless it was correctly signed. However that's just my personal red line specifically on those makers' pieces. Every single time I've looked at a piece unsigned but apparently deemed to be by Leveille or Auguste Jean, there is something about the piece that makes me feel it isn't by those makers. That said, my knowledge is very limited.
I'm sure there must be lots of glass as yet unknown and perhaps there really was unsigned pieces sent out from those houses but I know
I don't have the knowledge to make that judgement though so I wouldn't risk my money.
Example of a very expensive unsigned piece here from Christies -
https://www.christies.com/en/lot/lot-a-french-japonisme-gilt-and-silvered-bronze-mounted-6203754/ On the CW piece, the cartouche is in a similar style to the OP's here isn't it? Both in terms of design and execution and quality. I wonder if it has a polished pontil mark ?
The original vase in this thread does not have a polished pontil mark does it?
I only have a few books on French glass but will have a look through next week.